---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 05/01/19 22:17
Description: Exception generating new chunk

java.lang.ClassCastException


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	at ud.a(SourceFile:319)

-- Chunk to be generated --
Details:
	Location: -73,21
	Position hash: 94489280439
	Generator: bsy@459fef26
Stacktrace:
	at ud.a(SourceFile:319)
	at ud$$Lambda$2142/249639357.apply(Unknown Source)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at ud.a(SourceFile:310)
	at ud$$Lambda$2102/1827112351.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
	at ue$$Lambda$2123/96197759.accept(Unknown Source)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at ue.a(SourceFile:69)
	at ue$$Lambda$2108/517350511.run(Unknown Source)
	at aey.f(SourceFile:83)
	at aey.a(SourceFile:122)
	at aey.run(SourceFile:91)
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

-- Affected level --
Details:
	Level name: last snapshot of the year
	All players: 1 total; [us['TheRedstoneRazor'/4142, l='last snapshot of the year', x=-852.52, y=65.00, z=270.98]]
	Chunk stats: ServerChunkCache: 8834
	Level seed: 6119009283623993622
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (0,73,-175), Chunk: (at 0,4,1 in 0,-11; contains blocks 0,0,-176 to 15,255,-161), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 15925 game time, 15925 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 96739 (now: false), thunder time: 116188 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true

-- System Details --
Details:
	Minecraft Version: 18w50a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 404664152 bytes (385 MB) / 3053453312 bytes (2912 MB) up to 3221225472 bytes (3072 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx3G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Player Count: 1 / 8; [us['TheRedstoneRazor'/4142, l='last snapshot of the year', x=-852.52, y=65.00, z=270.98]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.